Threshing-machine.



H. M. BOB.

THRESHING MACHINE.

APPLICATION FILED MAR. 25, 1910.

INVENTOR Hams JiZfioe ATTORNEYS Patented Feb. 13, 1912.

3 SHEETS-SHEET 1.

WITNESSES COLUMBIA PLANDGRAPH CO.,WASHINGTON. D. c.

Patented Feb. 13, 1912.

3 SHEETS-SHEET 2.

IV V E N T0 H Ham/W306 WITNESSES:

ATTORNEYS COLUMBIA PLANOGRAPH 60.. WASHINGTON. n. c.

H. M. BOB.

THRESHING MACHINE.

APPLICATION FILED MAR. 25, 1910.

1,917,129, Patented Feb. 13,1912.

3 SHEETS-SHEET 3 y k L z; 7l\ q v r' WITNESSES: E IIVVEIVTOR COLUMBIAPLmoaRAPH 60., WASHINGTON, n. c.

Tl E STATES HANS lVL BOE, OF HAMPDEN, NORTH DAKOTA.

THRESHING-MACHINE.

App1ication filed March 25, 1910.

To all whom it may concern: Be it known that I, HANS M. B011, a citizenof the United States, and a resident of Hampden, in the county of Ramseyand State of North Dakota, have invented a new and ImprovedThreshing-Machine, of whlch the following is a full, clear, and exactdescription.

Among the principal objects which the present invention has in view are:to provide means for winnowing the straw, chaff and grain in a threshingmachme and to deliver the same across an air blast intermedi ate thegrain conveyers of a threshing ma chine; and to provide a vibratingmechanism which is simple and efficient to counterbalance the weight ofthe upper and lower separating racks.

One embodiment of the present invention is disclosed in the structureillustrated in the accompanying drawings, in which like characters ofreference denote corresponding parts in all the views, and in which-Figure 1 is a vertical longitudinal central section of a threshingmachine constructed and arranged in accordance with the presentinvention; Fig. 2 is an enlarged detail view in vertical longitudinalsection, illustrating the arrangement of the winnowing racks and drivingmechanism'therefor, and showing the relation between the same and theconveyer mechanism for the grain and the auxiliary interposed air blastfor cleaning the said grain in transit; and Fig. 3 is a vertical crosssection taken on the line 3-8 in Fig. 2, illustrating the arrangement ofthe grain conveyers. The threshing machine to which the presentinvention is applied is in the major part of known construction. Adraper 4 delivers the straw and grain under a feeder 5, and over anapron 6 to a rack 7. From the rack 7 the straw is extracted by athreshing cylinder 8, being downwardly carried between projections 9, 9,where the straw is beaten or threshed and separated in part from thegrain and heads or chafi. The broken mass is delivered over a platform10 upon saw toothed racks 11. The racks 11 are constructed from a seriesof parallel rods disposed in edgewise arrangement, and separated to passchaff heads or small rubbish to permit the same to rest on slabs 12, 12.The slabs 12, 12 are extended transversely across the frame carrying theracks 11, 11, and are wedge-shaped, the wedge being upturned andSpecification of Letters Patent.

Patented Feb. 13, 1912.

Serial No. 551,469.

arranged to support small rubbish and the heavier chaff. The slabs 12,12 are preferably pitched toward the delivery end of the rack with whichthey are incorporated. Directly below the slabs 12, 12 is a corrugatedpan bottom 13, the corrugations wherein are low pitched and inclinedupward toward the delivery end of the said pan. The frame is mounted insuitable side pieces, and closed at the rear by a partition 14. Theupper winnowing frame thus described is, in the present instance,mounted upon a pivot link 15, which is pivotally secured at 16 to theside of the machine. At the opposite or delivery end of the winnowingframe it is secured to the arm 17 of a bell crank 18. The link 15 andbell crank 18 illustrated in Fig. 1 are duplicated on the opposite sideof the machine, not shown in the said figure, and form the supports forthe upper winnowing frame.

The winnowing frame above described is duplicated in the lower part ofthe box body of the threshing machine, where, however, the frame ischanged in certain minor essentials. An inclined section 19 is providedat the forward end of the threshing machine to the more quickly deliverthe straw from the forward end, and thereby relieve the possiblecongestion which might occur at this end of the machine. The saw toothedracks 11, and the slabs 12, are arranged in the manner above described.The corrugated bottom 13, is, however, limited, and delivers on to aperforated sieve 20 at the delivery end of the lower winnowing frame,which is co-incident with the rear end of the threshing machine frame.The lower winnowing frame is pivotally mounted on a link 21 at thedelivery end of the said frame, and upon the short arm 22 of a bellcrank 23 at the forward or receiving end of the said lower frame.

The grain, straw and chaff are, by the lower winnowing frame, deliveredat the rear of the threshing machine, the grain passing through thesieve 20 upon an inclined sieve 24, and through the same upon the bottomof a shoe 25. The shoe 25 delivers at the lower end into a screwconveyer 26, transversely disposed and adapted to laterally deliver thegrain to suitable receptacles conveniently placed.

The chaif and straw are delivered into a chute 27, a fan 28 thereindriving the said chaff and straw upward through the said chute to bedelivered out of the madrafts provided for that purpose.

chline and upon what is known as the straw p1 e.

The grain, in the present invention, is delivered from the upperwinnowing frame to the screw 26, by which it is delivered to be sackedin a manner differing from any of the known threshing machines, and in amanner to subject the grain more thoroughly to the cleansing influenceof the air The draft referred to is produced by a fan 29 mounted withina casing 30, as in former machines. This "draft is directed against thegrain while contained in the shoe 25 and while upon the sieve 24thereof. This is the final cleansing imparted to the grain before thesame is sacked. In the present invention the blast from the fan 25 isdivided, being upwardly directed by av deflecting board and carriedunder the corrugated bottom 13 of the lower winnowing frame. The bottom13 is perforated, perforations being preferably formed in the uprightwalls of the corrugations. The draft of air is thus directed frombeneath against the layer of grain on the said bottom 13, which draftlifts the finer chaff during the vibration of the bottom 13, making theseparation from the grain the easier when the same arrives at the sieve20.

In the present invention a further blast is produced by a fan or beater31, mounted transversely of the threshing machine and suitably ournaledin the sides thereof. The beater 31 is suitably cased in a casing 32which opens outwardly across the delivery end of the pan bottom 13 ofthe upper winnowing frame. The bottom 13 of the upper winnowing frame isarranged and disposed above a double pitched'screw conveyer 33, which islikewise mounted transversely in the threshing machine and extendedthrough the sides thereof. A cylindrical casing 34 is provided for thescrew 33, the upper edge whereof is forwardly flared to provide for anymiscalculated throw of the grain from the pan bottom 13. The grain, inpassing thus from the bottom 13 to the screw 33, is at this pointsubjected to the gentle but constant draft of air from the beater 31.The result of this action is that when the grain passes to the screw 33to be delivered thence to the pan bottom 13 in the lower winnowingframe, it is denuded of the major portion of the chaff which is of thelighter kind, having passed through the slats 12, 12, or carried on thegrains by fibrous adherence.

The screw 33 is oppositely pitched, as illustrated in Fig.3 of thedrawings. A shaft 35, upon which the said screw is mounted, is journaledin bearings 36, 36, and suitable openings 37, 37 are provided for theextension of the bottom of the casing 34 beyond the sides of thethreshing machine. Built outwardly from the sides of the threshingmachine are casings 38, 38, into which the screw, 33 forces the grainequally on opposite sides of the longitudinal center of the threshingmachine. The shaft 35 is belt driven by a pulley 39, and is providedwith two sprocket wheels 40, 40 on opposite ends of the said shaft. Thesprocket wheels 40, 40 are alined with sprocket wheels 41, 41, which aremounted on a shaft 42 extended under the inclined section 19 of the rackforming part of the lower winnowing frame, and above the rear end of thebottom 13 of the said lower winnowing frame. The sprockets 40 and 41 areconnected by a sprocket chain 43, at convenient intervals on which aremounted laterally extended blades 44, 44. The blades 44 on the underside of the casings 38 operate to scrape on the said under side toadvance the material or grain as delivered thereon by the screw 33.

At the lower end of the casings 38 there are provided extensions 46, 46,which are passed through openings45, 45 in the sides of the lowerwinnowing frame. The extensions 46, 46 serve to deliver the grain fromthe casings 38, 38 upon the bottom 13 of the lower winnowing frame. Theblades 44, 44 serve to prevent the clogging of the grain in the casings38, 38.

The beater 31 is provided with a shaft 47, at the outer end whereof ismounted a gear wheel 48 and a pulley 49. The pulley 49 is directlyconnected with the pulley 39 by a belt 50, thus securing a uniformity inthe rotary action of the beater 31 and screw 33. The gear wheel 48 ismeshed with a larger gear wheel 51, which is mounted upon a shaft 52,suitably journaled in the side of the threshing machine, and havingfixedly mounted thereon a disk 53. The disk 53 is provided with a crankpin 54 on which are journaled connecting rods 55, 55. The rods 55, 55are pivotally connected at 56 and 57 with the bell-cranks 18 and 23respectively. It will be observed that with the rotation of the disk 53the long arms of the bell cranks 18 and 23 are lifted and lowered inalternate directions. The short arms 17 and 22 of the said bell cranks,being vertically extended, are rocked to oscillate the upper and lowerwinnowing frames in a horizontal path and in simultaneously oppositedirections. In this manner the throw of each of the frames iscounterbalanced and the operating strain on the disk 53, and the drivingmechanism connected therewith, is proportionally eased.

Mounted upon the shaft 47 of the beater 31 is a large pulley 58,disposed to receive a driving belt 59, which is connected directly tothe driving pulley 60 of a motor 61. An idler 62 is suitably mounted onthe side of the frame and constructed in such manner as to take up theslack of the belt 59. I

As thus far described the action of the threshing machine has been shownto effect a more thorough cleaning of the grain before the same issacked. It has also been shown that the motive power furnished for theoperation of the various fans and vibrating frames has been derived fromthe driving pulley of the motor. The motor 61 is suitably mounted at theforward end of the body of the threshing machine, a chassis having siderails 63 being formed and shaped to support thesaid motor and rotaryparts connected therewith, and shafts 64 and 65 and the axles 66-of therear carrying wheels. The axles 66 are held in guide loops 67, suitablesprings being disposed above the said axles or interposed between thechassis rail and the body of the thresher to relieve the ar of thetraction on the wheels 68 and 69. -The driving shaft for the motor 61 isprovided with a suitable gear pinion 70, which is tooth engaged with agear wheel 71 mounted in suitable bearings formed on the side rails 63.The gear wheel 71 is fixedly mounted on a shaft 7 2, on which is mounteda small sprocket wheel 73. The sprocket wheel 73 is connected with asprocket 74, fixedly mounted on the shaft 64. The gear wheel 7 4 isconnected with the gear wheel 7 3 by a sprocket chain 75. Fixedlyattached to the shaft 64 is a smaller gear wheel 76, which is meshed intoothed engagement with a large gear wheel 77. The gear wheel 77 isfixedly mounted on the shaft 65, on which is similarly mounted a smallgear wheel 78. The small gear wheel 78 is meshed in toothed engagementwith a large gear wheel 79. The reducing gears interposed between themotor 61 and the driving traction wheel 68 are the pinion 70, wheels 71and 73, chain 75, and

wheels 74, 76, 77, 78 and 79. The transmis sion gear, in combinationwith the motor 61-, and the traction wheel 68, constitute the tractorfeature of the present invention.

The wheels 69 are swiveled in suitable knuckles 80 provided in theforward axles. Extension arms 81 connected with the said knuckles areoperated by a steering post 82, at the upper end of which is a wheel 88,and at the lower end of which is an extension arm 84. The arm 84 and anarm 85 are connected by a link 86, whereby the wheels are turned toeither the right or the left. In the present form of construction themotor is disposed below a drivers seat 87 in the cab 88 provided for theprotection of the driver.

With a threshing machine equipped with a tractor and driving mechanismas above described, the operat-im consists in using the tractormechanism for transferring the threshing machine from point to point.When having arrived at the station for work, the motor is disconnectedfrom the tractor mechanism and connected with the driving mechanism.Suitable clutches, belt shifters, or other well known and suitable meansare employed to vary the operative connection of the motor 61 with thetwo distinct mechanisms.

Any form of motor, and transmission mechanism connected therewith. fcrdriving the traction wheels 68 may be employed, together with speedgears of any approved type of construction. In the present drawings Ihave limited the illustration to a common type of internal combustionengine, and the simplest form and most direct mounting of a transmissionmechanism for utilizing the engine for transportation purposes.

By the arrangement of the beater 31 and the inclined section 1.9'of thelower rack 11, the straw received from the upper rack at the deliveryend thereof is advanced to the delivery end of the lower rack the morequickly. Should the straw tend to clog at this point, the blades of thebeater 31 serve to advance the straw well as to operate as a fan towinnow the grain.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is 1. A threshing machine of the characterspecified comprising a box-like body; a plurality of approximatelyhorizontal superposed straw racks arranged to advance the straw thereonin opposite directions; an inclined straw rack section formed on thelower of said straw racks; a rotary beater mounted in bearings in saidbody and eX- tended transversely across the lower of said racks: andhaving arms adapted to remove the straw from said inclined rack sectiontoward the delivery end of the lower of said straw racks; and means forrotating the said beater and vibrating the said racks.

9.. A threshing machine of the character specified comprising a box-likebody; a plurality of superposed straw racks vibratively mounted therein;means for vibrating said straw racks to advance material thereon inopposite directions; a grain pan mounted on the upper of said racksarranged to deliver the grain therefrom near the straw delivery end ofsaid rack; a conveyer trough disposed below the delivery end of saidgrain pan; a beater rotatively mounted in said body having bladesadapted to impinge upon and spread the straw upon the lower of'saidracks and to cause an air current between said grain pan and saidconveyer trough; and a shield for guiding said air current.

3. A threshing machine of the character specified comprising a bodyportion; a plurality of superposed straw, racks vibratively mountedtherein; a sharply inclined end rack section rigidly mounted on thelower of said straw racks at the receiving end thereof; a grain panmounted on the upper of said racks arranged to deliver the graindelivered from near the straw delivery end of said rack; a conveyertrough transversely mounted in said body below the delivery end of saidgrain pan to receive the grain therefrom; a rotary fullbladed beaterrotatively mounted in said body adapted to distribute straw on the lowerof said racks and to create an air current to flow between the saidgrain pan and said conveyor trough; a shield for said ing witnesses. v

I HANS M. BOE. Witnesses:

G. GRIMSON, REGINA B. BOE."

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

